2026-09-21T17:40:30Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/90739 2023-07-11 col_2142_5131 com_2142_5130

This Thesis was approved for publication on 2016-04-07 at 16:22. DSpace SAF Submission Ingestion Package generated from Vireo submission #9159 on 2016-07-07 at 13:48:52 Made available in DSpace on 2016-07-07T20:27:08Z (GMT). No. of bitstreams: 2 MARTIN-THESIS-2016.pdf: 38917511 bytes, checksum: e0434ffdacfc3d74668bdd52b5ae69ef (MD5) LICENSE.txt: 4212 bytes, checksum: d69d3ffc2d56b21ab8f1806f97ccc243 (MD5) Previous issue date: 2016-04-07 Embargo set by: Seth Robbins for item 93091 Lift date: 2018-07-07T20:28:14Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system Haran, Kiruba S. Martin, Jonathan Max 2016-07-07T20:27:08Z 2016-07-07T20:27:08Z 2018-07-08T09:15:33Z 2016-04-07 2016-05 This thesis proposes the development of high-frequency airgap windings for a 1 MW permanent magnet electric machine designed for aerospace applications. A centerpiece of the design is focused on increasing the power density of the machine to 8 hp/lb, a factor of two greater than the state-of-the-art electric machines, while maintaining 96% efficiency. In essence this design specification demands increasing the electrical loading per lowest weight, which can be achieved by employing high-frequency armature currents together with a high pole count. This work will aim to design and implement an armature winding design made out of Litz wire that minimizes the extent of increased AC losses due to higher operating frequencies while simultaneously remaining a manufacturable solution. The approach will be based on identifying a numerical model that aids in selecting a specific conductor topology that minimizes copper losses, while a more refined finite element model will be used to verify these results. To verify the methods used to compute losses, the results of a caliometric experiment will be presented to validate the design approach. Ultimately, a manufacturing process will be demonstrated to conclude the development phase of the winding by presenting several hardware trials that implement the proposed conductor topology that resulted from the previous analysis. Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2018-05-01 The student, Jonathan Martin, accepted the attached license on 2016-04-06 at 17:35. The student, Jonathan Martin, submitted this Thesis for approval on 2016-04-06 at 17:44. Embargo set by: Seth Robbins for item 93091 Lift date: 2018-07-07T20:35:34Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system U of I Only Restriction Lifted for Item 93091 on 2018-07-08T09:15:33Z. application/pdf http://hdl.handle.net/2142/90739 en Copyright 2016 Jonathan Max Martin High-Frequency High-Power Density AC Loss Armature Winding "Development of high-frequency ""airgap"" windings for high-power density electrical machines" text text Electrical & Computer Eng Electrical & Computer Engr University of Illinois at Urbana-Champaign Thesis M.S.